Section 1: Forces and Motion Flashcards
What does the gradient on a distance-time graph tell you
the speed
what does a flat section on a d-t graph tell you about the objects movements
it has stopped
what does the gradient on a speed-time graph tell you
acceleration
mass is measured in… using a…
g/kg etc. measured using a mass balance/scales
weight is measured in… using a …
Newtons (N) using a spring balance or a newton meter
which is a force: mass or weight?
weight
In what direction does the reaction force act? and which forces does it act against?
acts straight upwards, counter-acting the force of gravity/weight
HOW CA YOU REDUCE FRICTION between solid surfaces?
by putting a lubricant eg. oil/grease between the surfaces.
How can you reduce resistance/drag from fluids? (liquids/gases)
streamlining the object
what happens to the frction as the seed increases?
it increases
What factors could affect the motion of a toy car on a ramp? (4)
- Mass
- friction- is the surface a rug or a wooden plank?
- acceleration due to gravity- higher/lower up the ramp
- angle of ramp
objects reach terminal velocity when which forces are equal?
accelerating force and resistance.
terminal velocity of a falling object depends on its…(2)
shape and area
affect of n increased surface area on drag?
increased drag
affect of increased drag on terminal velocity?
decreased
